Investigation of Secondary Winding Structure in Multi-Core Transformer in MHz Inverter using Frequency Multiplying

Koji Orikawa, Satoshi Ogasawara, Masatsugu Takemoto, Jun Ichi Itoh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

This paper investigates secondary winding structures in a multi-core transformer in a MHz inverter using a frequency multiplying method at the output frequency of 2.5 MHz which is five times of the switching frequency of 500 kHz. The proposed circuit can generate high output frequency by using a multi-phase inverter with phase shift control and the multi-core transformer while the switching frequency and an operational frequency of the multi-core transformer is lower than the output frequency. Therefore, an iron loss of the multi-core transformer is reduced, which results in high efficiency. In this paper, two prototypes of the multi-core transformers which have different secondary winding structures are made and compared from the view point of a leakage inductance and a parasitic capacitance viewed from the secondary side of the multi-core transformer. As a result, it is confirmed that the effect of the parasitic capacitance viewed from the secondary side of the multi-core transformer to a series resonant capacitor connected to the secondary side of the multi-core transformer in series is reduced to 1/4 compared with a loosely-coupled multi-core transformer by a highly-coupled multi-core transformer.

Original languageEnglish
Title of host publication2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1279-1286
Number of pages8
ISBN (Electronic)9781479973118
DOIs
Publication statusPublished - Dec 3 2018
Externally publishedYes
Event10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018 - Portland, United States
Duration: Sep 23 2018Sep 27 2018

Publication series

Name2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018

Other

Other10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018
CountryUnited States
CityPortland
Period9/23/189/27/18

Keywords

  • Complex permeability
  • Frequency multiplying
  • Leakage inductance
  • Multi-core transformer
  • Parasitic capacitance

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Control and Optimization
  • Computer Networks and Communications
  • Hardware and Architecture
  • Information Systems and Management

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